12783015844 has 9 divisors (see below), whose sum is σ = 22370673451. Its totient is φ = 6391394860.

The previous prime is 12783015841. The next prime is 12783015859. The reversal of 12783015844 is 44851038721.

The square root of 12783015844 is 113062.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12783015844.

It is not an unprimeable number, because it can be changed into a prime (12783015841) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 197859 + ... + 254389.

Almost surely, 2^12783015844 is an apocalyptic number.

12783015844 is the 113062-nd square number.

It is an amenable number.

12783015844 is a deficient number, since it is larger than the sum of its proper divisors (9587657607).

12783015844 is an frugal number, since it uses more digits than its factorization.

12783015844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113066 (or 56533 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 12783015844 in words is "twelve billion, seven hundred eighty-three million, fifteen thousand, eight hundred forty-four".